Physical and mechanical properties of the three breeding generations of Acacia mangium planted in Central Java, Indonesia

Timber Acacia mangium (Acacia mangium, Willd) for Furniture. The study aims to determine the mechanical and physical properties and the decorative value (color and fiber) wood of acacia mangium with using finishing materials. This type of finishing material used is ultran lasur natural dof ,ultran lasur classic teak, aqua politur clear dof, aqua politur akasia dan aqua politur cherry. After finishing the wood is stored for 3 months. Test parameters were observed, namely, physical and mechanical properties of wood, adhesion of finishing materials, color and appearance of the fiber, and timber dimensions expansion. The results showed that the mechanical physical properties of acacia wood qualified SNI. 01-0608-89 about the physical and mechanical properties of wood for furniture, air dry the moisture content from 13.78 to 14.89%, flexural strength from 509.25 to 680.50 kg/cm2, and compressive strength parallel to fiber 342.1 - 412.9 kg/cm2. Finishing the treatment process using five types of finishing materials can increase the decorative value (color and fiber) wood. Before finishing the process of acacia mangium wood has the appearance of colors and fibers and less attractive (scale scores 2-3), after finishing acacia wood fibers have the appearance of colors and interesting and very interesting (scale 4-5).Keywords: mangium wood, mechanical properties, decorative value, finishing, furniture.

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SIFAT FISIK DAN MEKANIK PAPAN GIPSUM DARI LIMBAH KAYU AKASIA (Acacia mangium Willd) BERDASARKAN KADAR GIPSUM DAN UKURAN SERBUK KAYU

JURNAL HUTAN LESTARI ◽

10.26418/jhl.v7i1.31800 ◽

2019 ◽

Vol 7 (1) ◽

Author(s):

Ridho Pratama ◽

M Dirhamsyah ◽

. Nurhaida

Keyword(s):

Mechanical Properties ◽

Raw Materials ◽

Acacia Mangium ◽

Physical And Mechanical Properties ◽

Powder Size ◽

Wood Powder ◽

Gypsum Board ◽

Randomized Design ◽

Gypsum Content ◽

Two Factors

This study aims to examine the physical and mechanical properties of gypsum board from Acacia mangium Willd wood waste based on gypsum content and wood powder size. This study refers to the JIS A 5417-1992 standard. This research were conducted at Wood Work Shop laboratory for the preparation of raw materials, Wood Technology laboratory Faculty of Forestry for board making and testing the physical properties of gypsum boards, and PT. Duta Pertiwi Nusantara laboratory to test the mechanical properties of the gypsum board. The material used is A. mangium W. Wood powder, gypsum flour, water and borax. The study uses Factorial Completely Randomized Design (CRD) with two factors, namely factor A (gypsum content) which consists of gypsum content of 400%, 500% and 600% of the weight of A. mangium W. wood powder, and factors B (wood powder size) consists of 20 mesh passes 40 mesh retained and 40 mesh passes 60 mesh retained. The results showed that the density (600% gypsum content of 40 and 60 mesh retained wood powder size), moisture content, thickness swelling, MOE (600% gypsum content of 40 and 60 mesh retained wood powder size) fulfill JIS A5417-1992 standard. The best gypsum board is gypsum board with gypsum content of 600% with a wood powder size is 40 mesh.Keyword: Acacia mangium, gypsum board, gypsum content, wood powder size.

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Physical and mechanical properties of (Acacia auriculiformis x A mangium) hybrid Acacia

Journal of Bangladesh Academy of Sciences ◽

10.3329/jbas.v34i2.6864 ◽

1970 ◽

Vol 34 (2) ◽

pp. 181-187 ◽

Cited By ~ 10

Author(s):

UK Rokeya ◽

M Akter Hossain ◽

M Rowson Ali ◽

SP Paul

Keyword(s):

Mechanical Properties ◽

Specific Gravity ◽

Acacia Mangium ◽

Physical And Mechanical Properties ◽

Tectona Grandis ◽

Acacia Auriculiformis ◽

Timber Species ◽

Green Condition ◽

Natural Crossing ◽

Academy Of Sciences

The physical and mechanical properties of hybrid Acacia, produced from natural crossing between two introduced timber species (Acacia auriculiformis and Acacia mangium) were studied. The timber hybrid Acacia is of medium dense having specific gravity 0.56 at green condition which is less than that of teak (Tectona grandis). The volumetric shrinkage of hybrid Acacia wood was found greater than that of teak but the specific gravity was found less than that of teak. From the study of physical and mechanical properties it is evident that the species is moderately strong. The species is suitable for making furniture and other household articles. Key words: Hybrid Acacia; Specific gravity; Physical properties; Mechanical properties DOI: 10.3329/jbas.v34i2.6864Journal of Bangladesh Academy of Sciences, Vol. 34, No. 2, 181-187, 2010

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Pengaruh Kecepatan Pertumbuhan terhadap Sifat Fisika dan Mekanika Kayu Acacia Mangium Umur 4 Tahun Asal Wonogiri, Jawa Tengah

Jurnal Ilmu Kehutanan ◽

10.22146/jik.40162 ◽

2018 ◽

Vol 12 (2) ◽

pp. 248

Author(s):

Fanny Hidayati ◽

Ramadhani Ayu Purnama ◽

Harry Praptoyo ◽

Sri Sunarti

Keyword(s):

Mechanical Properties ◽

Growth Rate ◽

Compressive Strength ◽

Growth Rates ◽

Basic Density ◽

Acacia Mangium ◽

Physical And Mechanical Properties ◽

R Ratio ◽

Significant Difference ◽

One Way Anova

Kebutuhan masyarakat akan kayu solid yang semakin meningkat, memberikan peluang bagi jenis pohon cepat tumbuh seperti Acacia mangium untuk digunakan sebagai bahan semi konstruksi maupun konstruksi. Secara umum, kualitas kayu dipengaruhi oleh sifat pertumbuhan terutama kecepatan pertumbuhan. Pengaruh kecepatan pertumbuhan terhadap sifat-sifat kayu mangium belum banyak di diteliti. Oleh karena itu, penelitian ini bertujuan untuk mengetahui sifat fisika dan mekanika kayu mangium pada kecepatan tumbuh yang berbeda serta hubungan antara kerapatan dasar dengan sifat-sifat lain yang diuji. Sembilan pohon mangium umur 4 tahun yang digunakan dalam penelitian ini berasal dari Kabupaten Wonogiri, Jawa Tengah. Adapun sifat-sifaf kayu yang diuji adalah kerapatan dasar, perubahan dimensi, rasio T/R, keteguhan lengkung statis (MOE dan MOR), keteguhan tekan sejajar dan tegak lurus serat. Selanjutnya data yang diperoleh diuji dengan one-way ANOVA. Sebagai hasilnya, sifat fisika dan mekanika kayu yang diuji menunjukkan hasil yang tidak berbeda nyata pada tiga kategori kecepatan tumbuh yang berbeda, kecuali pada penyusutan radialnya. Selanjutnya, kerapatan dasar berkorelasi positif secara signifikan terhadap penyusutan radial dan tangensial serta kekuatan tekan sejajar dan tegak lurus serat. Hal ini menunjukkan bahwa kerapatan dasar merupakan indikatoryang bagus untuk mempredikasi sifat fisika dan mekanika kayu mangium. Effect of Growth Rate on Physical and Mechanical Properties of 4-year-old Acacia mangium Wood from Wonogiri, Central JavaAbstractIncreasing solid wood demand provides an opportunity to fast-growing wood species such as Acacia mangium as semi construction and construction materials. In general, the quality of wood is affected by growth characteristics such as radial growth rate. The study about effect of growth rate on the properties of mangium wood is limited in Indonesia. Therefore, this study aimed to determine the physical and mechanical properties of mangium wood at different growth rates. Furthermore, relationship between basic density and other properties was clarified. The nine mangium trees of 4-year-old used in this study were planted in Wonogiri Regency, Central Java. Basic density, shrinkage, T/R ratio, static bending strength (MOE and MOR), compressive strength parallel and perpendicular to grain were determined. The results were analyzed with one-way ANOVA. As a result, the physical and mechanical properties of the woods showed no significant difference in three different categories of growth rates, except for radial shrinkage. Furthermore, the basic density is positively significant correlated with radial and tangential shrinkage and also compressive strength parallel and perpendicular to grain. Based on these results, it is suggesting that basic density is a good indicator for predicting physical and mechanical properties of mangium wood.

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EFFECT OF AGE ON VARIATION IN PHYSICAL AND MECHANICAL PROPERTIES OF Acacia mangium PLANTED IN THAI NGUYEN

TNU Journal of Science and Technology ◽

10.34238/tnu-jst.3689 ◽

2021 ◽

Vol 226 (01) ◽

pp. 50-56

Author(s):

Dương Văn Đoàn ◽

Nguyễn Văn Thái ◽

Khổng Văn Mạnh

Keyword(s):

Mechanical Properties ◽

Acacia Mangium ◽

Physical And Mechanical Properties ◽

Effect Of Age

Nghiên cứu này nhằm điều tra ảnh hưởng của tuổi đến một số tính chất vật lý và cơ học của gỗ Keo tai tượng trồng tại Thái Nguyên như: khối lượng thể tích (AD), độ bền uốn tĩnh (MOR), và mô đun đàn hồi uốn tĩnh (MOE). Các mẫu gỗ có kích thước 20 (xuyên tâm) 20 (tiếp tuyến) 320 (dọc thớ) mm được cắt từ vị trí ngang ngực của các cây mẫu ở tuổi 7, 10, và 14. Kết quả nghiên cứu đã chỉ ra rằng: giá trị trung bình AD ở độ ẩm 12% của Keo tai tượng tuổi 7, 10, và 14 lần lượt là 0,48 g/cm3, 0,51 g/cm3, và 0,53 g/cm3. Giá trị trung bình MOR của gỗ Keo tai tượng tuổi 7, 10, và 14 lần lượt là 64,38 MPa, 71,59 MPa, và 73,46 MPa, trong khi đó giá trị MOE lần lượt là 7,31 GPa, 8,77 GPa, và 9,10 GPa. AD có mối tương quan dương rõ ràng với các tính chất cơ học ở tất cả các tuổi trong nghiên cứu này. Điều này gợi ý rằng AD có thể là một thông số hữu ích để dự đoán được các tính chất cơ học của gỗ Keo tai tượng trồng tại Thái Nguyên. Cả AD, MOR, và MOE đã tăng lên đáng kể từ tuổi 7 đến tuổi 10 nhưng sau đó tăng chậm dần và có xu hướng không thay đổi đến tuổi 14. Kết quả của nghiên cứu này là tài liệu tham khảo quan trọng cho người trồng rừng Keo tai tượng khi quyết định có nên kéo dài thời gian trồng sau 10 năm hay không.

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SIFAT FISIKA DAN MEKANIKA KAYU JABON MERAH (Anthocephalus macrophyllus) YANG DITANAM DI WONOGIRI, 2 JAWA TENGAH

Jurnal Hutan Tropis ◽

10.20527/jht.v8i3.9739 ◽

2020 ◽

Vol 8 (3) ◽

pp. 357

Author(s):

Fanny Hidayati ◽

Sri Sunarti ◽

Teguh Setiaji ◽

Arif Nirsatmanto

Keyword(s):

Mechanical Properties ◽

Mechanical Characteristics ◽

Bending Strength ◽

Physical And Mechanical Properties ◽

Wood Properties ◽

Dry Density ◽

Improvement Program ◽

Average Value ◽

Central Java ◽

Physical And Mechanical Characteristics

Red jabon is one of the fast growing species. It is growth well in tropical countries. It has a potential to fulfill the demand of wood. Tree imrovement program of this species has been done in Indonesia. However, information of wood properties related to tree improvement program of red jabon is limited. Therefore, wood properties such as physical and mechanical properties of this species at the progeny trial were needed to clarify. The aims of this research were to clarify the variation of physical and mechanical properties of red jabon from 5 families at5-year-old planted in Wonogiri, Central Java and relationship between air-dry density and mechanical properties. As the result, physical and mechanical properties were varied among 5 families. Based on the results, famili number 85 performed good result of physical and mechanical characteristics, eventhough the physical properties were not highest among 5 families but it was abouf the average value. Furthermore, this family showed the best values of all mechanichal characteristics tested. In addition, air-dry density has highly positive significantcorrelation with mechanical properties (static bending strength and compressive strength parallel to grain), suggesting that mechanical properties can be predicted by air-dried density.

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Stabilisasi Tanah Ekspansive dengan Menggunakan Tanah Putih untuk Tanah Dasar di Daerah Godong Kabupaten Grobogan Jawa Tengah

MEDIA KOMUNIKASI TEKNIK SIPIL ◽

10.14710/mkts.v24i1.16275 ◽

2018 ◽

Vol 24 (1) ◽

pp. 1 ◽

Cited By ~ 1

Author(s):

Sri Prabandiyani Retno Wardani ◽

Muhrozi Muhrozi ◽

Andi Retno Ari Setiaji ◽

Danny R Riwu

Keyword(s):

Mechanical Properties ◽

Expansive Soils ◽

Soil Mechanics ◽

Chemical Constituents ◽

Expansive Soil ◽

Physical And Mechanical Properties ◽

Dry Weight ◽

Central Java ◽

Soil Cement ◽

Engineering Department

Problematic soils such as expansive soils are common in Indonesia. There are several methods to overcome the damage caused by expansive soil, such as by mixing the soil with additives. Some researchers have conducted research by mixing additives into expansive soil (cement, lime, fly ash etc), which work to increase soil strength and reduce swelling. Considering that the people in Buraen Village of Kabupaten Kupang use white soil as a substitute for cement, where the white soil has chemical constituents almost the same as those owned by cement, and contain CaO as it has lime, it is necessary to do research to determine the effect of white soil on physical and mechanical properties of expansive soil, so it can be used as an additive. This research was conducted at Soil Mechanics Laboratory, Civil Engineering Department, Engineering Faculty, Diponegoro University, Semarang.with soil sample from Godong, Central Java and white soil in Buraen Village of Kupang Regency, which purpose to find out the change of physical and mechanical properties of expansive soil that have been given some variation of mixture of white soil to the dry weight of the soil, with optimum moisture content from standard Proctor test results. The results of this study indicate that white soil can be used as an additive and the use of OMC for mixing is the OMC of expansive soil.

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